Fix PCRE2_NO_AUTO_CAPTURE bug.

ChangeLog

@@ -213,6 +213,10 @@ and AddressSanitizer.
 61. Whitespace at the end of a pcre2test pattern line caused a spurious error 
 message if there were only single-character modifiers. It should be ignored.
 
+62. The use of PCRE2_NO_AUTO_CAPTURE could cause incorrect compilation results
+or segmentation errors for some patterns. Found with libFuzzer and
+AddressSanitizer.
+
 
 Version 10.20 30-June-2015
 --------------------------

src/pcre2_compile.c

@@ -3187,9 +3187,10 @@ for (; ptr < cb->end_pattern; ptr++)
 
     if (ptr[1] != CHAR_QUESTION_MARK)
       {
-      if (ptr[1] != CHAR_ASTERISK &&
-          (options & PCRE2_NO_AUTO_CAPTURE) == 0)
-        cb->bracount++;  /* Capturing group */
+      if (ptr[1] != CHAR_ASTERISK)
+        {
+        if ((options & PCRE2_NO_AUTO_CAPTURE) == 0) cb->bracount++;
+        }
       else  /* (*something) - just skip to closing ket */
         {
         ptr += 2;

testdata/testinput2

@@ -4583,4 +4583,8 @@ B)x/alt_verbnames,mark
 
 /^(o(\1{72}{\"{\\{00000059079}\d*){74}}){19}/I
 
+/((p(?'K/
+
+/((p(?'K/no_auto_capture
+
 # End of testinput2 

testdata/testoutput2

@@ -14668,4 +14668,10 @@ Overall options: anchored
 Last code unit = '}'
 Subject length lower bound = 65535
 
+/((p(?'K/
+Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator)
+
+/((p(?'K/no_auto_capture
+Failed: error 142 at offset 7: syntax error in subpattern name (missing terminator)
+
 # End of testinput2